DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 131

Manufacturer Part Number

DS72030W200FPV

MPU, 32BIT, SH7203, ROMLESS, 240QFP

Manufacturer

Renesas Electronics America

Program Memory Size

Digital Ic Case Style

Supply Voltage Range

1.1V To 1.3V

Operating Temperature Range

-20Â°C To +85Â°C

Rohs Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Figure 3.4 shows the floating-point register configuration. There are sixteen 32-bit floating-point

registers FPR0 to FPR15, referenced by specifying FR0 to FR15, DR0/2/4/6/8/10/12/14. The

correspondence between FRPn and the reference name is determined by the PR and SZ bits in

FPSCR. Refer figure 3.4.

1. Floating-point registers, FPRi (16 registers)

2. Single-precision floating-point registers, FRi (16 registers)

3. Double-precision floating-point registers or single-precision floating-point vector registers in

FPR0 to FPR15

FR0 to FR15 indicate FPR0 to FPR15

pairs, DRi (8 registers)

A DR register comprises two FR registers.

DR0 = {FR0, FR1}, DR2 = {FR2, FR3}, DR4 = {FR4, FR5}, DR6 = {FR6, FR7},

DR8 = {FR8, FR9}, DR10 = {FR10, FR11}, DR12 = {FR12, FR13}, DR14 = {FR14, FR15}

Floating-Point Registers

Transfer instruction case:

Operation instruction case: FPSCR.PR = 0 FPSCR.PR = 1

Figure 3.4 Floating-Point Registers

FPSCR.SZ = 0 FPSCR.SZ = 1

Reference name

Rev. 3.00 Sep. 28, 2009 Page 99 of 1650

Section 3 Floating-Point Unit (FPU)

REJ09B0313-0300